PIC18LC452T-I/L Equivalent & Substitute Parts

Part Overview

The PIC18LC452T-I/L is an 8-bit microcontroller from Microchip Technology's PIC® 18C series, featuring 32KB OTP program memory, 1.5KB RAM, and 33 I/O pins. The device operates at 40MHz with integrated connectivity options including I2C, SPI, and UART/USART interfaces. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PIC18LC452T-I/L

Microchip TechnologyIn Stock: 901PIC18LC452T-I/L Datasheet

Current PartRFQ

PIC18LC452-I/L

Microchip TechnologyIn Stock: 50424PIC18LC452-I/L Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PIC18LC452T-I/L is determined by strict equivalence across core electrical and mechanical parameters. The primary substitute identified is the PIC18LC452-I/L, which maintains identical specifications across all critical functional parameters: 8-bit core architecture, 40MHz operation, 32KB OTP program memory, 1.5KB RAM, 33 I/O pins, identical voltage supply range (2.5V ~ 5.5V), matching connectivity interfaces (I2C, SPI, UART/USART), and equivalent peripheral feature set.

The key differentiator between the main part and its substitute is packaging format. The PIC18LC452T-I/L is supplied in Tape & Reel (TR) format, while the PIC18LC452-I/L is supplied in Tube packaging. Both parts share the identical 44-LCC (J-Lead) package case and surface mount mounting type. The main part carries obsolete product status, whereas the substitute maintains active product status, ensuring continued availability and manufacturing support.

Substitution eligibility is based on the following parameters:

• Core processor architecture and instruction set compatibility
• Memory configuration (program memory size, type, and RAM capacity)
• Operating frequency and voltage specifications
• I/O count and peripheral feature parity
• Package case type and pin configuration
• Compliance certifications (RoHS3, REACH)

Parameter Comparison

Engineering Selection Recommendations

The PIC18LC452-I/L is a direct functional equivalent to the PIC18LC452T-I/L, with complete electrical and mechanical compatibility. Selection of the substitute part is supported by the following engineering criteria:

The main part (PIC18LC452T-I/L) carries obsolete product status, indicating discontinued manufacturing and limited availability. The substitute part (PIC18LC452-I/L) maintains active product status, ensuring reliable supply chain access and ongoing manufacturing support from Microchip Technology.

Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and legacy system support. The MSL rating of 3 (168 Hours) is equivalent across both parts, ensuring consistent moisture handling and storage protocols.

The only practical difference is packaging format: Tape & Reel versus Tube. This distinction affects procurement logistics and automated assembly processes but does not impact electrical performance, pin configuration, or functional capability. Selection between these packaging formats should be based on production volume requirements and assembly equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Can the PIC18LC452-I/L directly replace the PIC18LC452T-I/L in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 44-LCC (J-Lead) package case, pin configuration, and all functional specifications. The only difference is the supplier packaging format (Tube versus Tape & Reel).

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The main part is classified as obsolete, meaning Microchip Technology has discontinued production. The substitute part maintains active status, ensuring continued availability from authorized distributors and ongoing manufacturing support. For new designs or long-term system support, the active part is the appropriate selection.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical RoHS3 compliance and REACH unaffected status. MSL ratings are equivalent at 3 (168 Hours), ensuring identical moisture sensitivity handling requirements.

Q: Does the packaging format (Tape & Reel vs. Tube) affect electrical performance?

A: No. Packaging format is a logistics and assembly consideration only. It does not impact electrical characteristics, performance, or functionality. Selection should be based on production volume and assembly equipment requirements.

Q: Are the memory specifications identical between these parts?

A: Yes. Both parts feature 32KB OTP program memory (16K x 16), 1.5KB RAM, and identical I/O configuration (33 pins). Operating frequency, voltage supply range, and all peripheral features are equivalent.

Q: What is the base product number for these parts?

A: The base product number is PIC18LC452. The suffixes (-T-I/L and -I/L) indicate packaging and temperature grade variations, but the core microcontroller functionality remains identical.